Nipple.



F. S. SAKANAI.

NIPPLE.

APPLICATION FILED MAR.'3,19I6.

l ,21 2,81 9. Patntefl Jan. 16, 1917.

v :ELEi-.E;

jaEa 7101 FRED s. SAKANAI, or. SANIBANCISGO, CALIFORNIA.

NIPPLE.

Specification of Letters IBatent.

Patented Jan. 16, 1917.

Application filed March a, 1916. Serial a... 81,927.

To all whom it may concern:

Be it known that I, FRED S. SAKANAI, a subject of the Emperor of Japan,residing in the city and county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements inNipples; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledinthe art to which it appertains to make and use the same.

This invention relates to nipples for nursing bottles and the primaryobject of the invention is to provide a nipple which is 15 provided withan inwardly extending substantially conical portion, the inner or apexend of which is split to permit the inlet of air into .the bottle duringthe nursing or sucking of the nipple by an infant so as to permit thecontents of the bottle to flow freely out' of the nipple, and foreliminating a vacuum within the bottle which necessitates relativelystrenuous efforts on the part of an infant. v \Vith the foregoing andother objects in view this invention consists in such novel features ofconstruction, combination and arrangement of parts as will behereinafter more fully described, illustrated in the accompanyingdrawings and claimed.

In describing the invention in detail reference will be had to the.accompanying I. drawings wherein like characters designatereduced-portion 2 and is constructed of resilient rubber as is ordinaryin the construction of nursing nipples. The body of the nipple 1 has aninwardly extending conical projection 3 formed thereon, the inner end orapex of which is split as shown at 4 so as to permit the passage of airinto the bottle, when an infant is nursing or sucking upon the nipple,the sides of the split 4 diverge as they extend inwardly into theinterior of the conical extension, for weakening the extension to allowfree spreading movement of the sides of the split upon sudden actionupon the mouth 2. The entrance of air into the. bottle, prevents theformation of a vacuum, within the bottle, and permits the contents ofthe bottle to flow relatively freely out of .the perforatedreduced end 2of the nipple 1. The conical inwardly extending extension 3' is hollowas clearly shown at. 5 in Fig. 20f the drawings and the engagement oftheedges of the split portion l'of the conical extension and theelasticity of the member prevents the milk or other contents of thebottle from passing out through the split 4.

In Fig. 4 of the drawing, a modified form of the invention is shownwherein the nipple which is generically indicated by the numeral 10 isprovided with an opening 11 "upon the outer-end of the insert, whichprevents the accidental dislodgment of the insert with respect to thenipple 10.

In reducing the invention to practice, certain minor features ofconstruction, combination- 'and arrangement of. parts may necessitatealterations to which the 'patentee is entitled provided such alterationsare- .comprehended within the scope of what is claimed.

What is claimed is Q A nursing nipple including a, hollow bodyconstructed of resilient material, a mouthpiece formed upon said body, ahollow conical' extension formed upon said body and extending into thesame, the walls of said conical extension being equal in thickness to 75formed therein through which a substan the thickness of the body, saidconical extension having a split formed in its side, sides of said splitdiverging as they extend inwardly into the interior of the conicalexten- 'sion for weakening the extension to allowfree spreading movementof the sides of the split upon sudden action upon the mouthpiece.

In testimony whereof I affix my signature in presence of two witnesses.

FRED s. SAKANAIE. Witnesses I. ONAWARE,

